id:A054950 - OEIS Search Results

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Number of labeled semi-strong digraphs on n nodes with an even number of components.

+0
1

0, 1, 3, 76, 8220, 3418216, 5156362008, 28205998918336, 571801003320734400, 44006976469834509225856, 13095012982298536065778624128, 15245644966564725709168192019570176, 69953982671396722666217758540260522923520, 1270721533437616701720124856867026526491583190016 (list; graph; listen)

	OFFSET	`1,3`
	LINKS	`V. A. Liskovets, Some easily derivable sequences, J. Integer Sequences, 3 (2000), #00.2.2.`
	CROSSREFS	`Sequence in context: A042267 A141103 A054747 this_sequence A065993 A097802 A119200` `Adjacent sequences: A054947 A054948 A054949 this_sequence A054951 A054952 A054953`
	KEYWORD	`nonn,easy`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), May 24 2000`
	EXTENSIONS	`More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Mar 11 2003`

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.

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